Problem: Ripple on screen.

Troubleshooting and problem resolution:

1.Check to see if any of the following devices are located less than one meter from the computer: refrigerators, electric fans, electric dryers, UPS systems, regulators, fluorescent lamps or other computers that may be generating magnetic interference.

2.Move any interfering devices away from the computer.

3.If the problem persists, contact Lenovo Service.

Troubleshooting Audio Problems

Problem: No sound from the integrated speakers.

Troubleshooting and problem resolution:

Adjust the Windows volume control — select the speaker icon from the

Settings Charm or click the arrow on taskbar to show the hidden icons in Windows desktop mode, then click the speaker icon. Ensure that the volume is turned up and the sound is not muted. Adjust the volume, bass, or treble controls to eliminate distortion.

Reinstall the audio driver.

Disconnect any headphones from the headphone connector — sound from the speakers is automatically disabled when headphones are connected to the computer’s side-panel headphone connector.

Problem: No sound from headphones.

Troubleshooting and problem resolution:

Check the headphone cable connection — ensure that the headphone cable is securely inserted into the headphone connector.

Adjust the Windows volume control — select the speaker icon from the

Settings Charm or click the arrow on taskbar to show the hidden icons in Windows desktop mode, then click the speaker icon. Ensure that the volume is turned up and the sound is not muted.

User Guide 21

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Lenovo 2558, 3099, 57312709, 57RF0010, 57312430, H430, B540, 1194, 1196, 10080, 10091 manual Troubleshooting Audio Problems

1196, 1194, 10080, 3099, 10091 specifications

Lenovo has established a reputation for crafting reliable and high-performing devices tailored for both personal and professional use. Among its diverse portfolio, the Lenovo 57312709, 2558, 57RF0010, 57312430, and B540 models stand out for their innovative features and solid performance.

The Lenovo 57312709 model is designed primarily for business professionals. Its robust build quality ensures durability, making it ideal for users who are frequently on the move. This laptop boasts a sunlit-readable display, combined with anti-glare technology to enhance visibility in various lighting conditions. Powered by cutting-edge processors, it delivers efficient multitasking while optimizing energy consumption.

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Meanwhile, the Lenovo 57312430 caters to gamers and heavy software users. It is equipped with a dedicated GPU that amplifies graphical performance, allowing for smooth gameplay and efficient running of resource-intensive applications. Its cooling system is optimized to prevent overheating during extended usage, preserving both performance and longevity.

Lastly, the Lenovo B540, a hybrid laptop model, blends the functionality of a traditional laptop with the convenience of a touchscreen tablet. Its 360-degree hinge allows users to configure the device into various modes, providing flexibility for different use cases, whether for work, study, or leisure. The B540 also incorporates stylus support, enhancing creativity and productivity for art and design tasks.

Together, these Lenovo models reflect the company's commitment to innovation, user-centric design, and advanced technology. With a focus on performance, versatility, and practicality, they cater to a wide range of needs, from business to gaming and beyond, making Lenovo a trusted choice in today’s tech landscape.